Link will be apear in 30 seconds.
Well done! you have successfully gained access to Decrypted Link.
Step 1 of 2
(a).
Recall the formula for Z-score for data value x is
The z-score for 3min is
Table 13.10 indicates that 0.249 of the data is a normal distribution are between
and
. Because the data are normally distributed, 0.245 data is also between
and
. The percent of data to the right of the value
is 
. Thus 
customer spends waiting time in a grocery store will less than 3min.
Step 2 of 2
(b).
The z-score for 1min is
Table 13.10 indicates that 0.477 of the data is a normal distribution are between 
and
. Because the data are normally distributed, 0.477 data is also between 
and 
. The percent of data to the right of the value
is
. Thus
customer spends waiting time in a grocery store will less than 1min.
